One verse

Srimad Bhagavatam 10.52.2

10.52.2

संवीक्ष्य क्षुल्ल‍कान् मर्त्यान् पशून्वीरुद्वनस्पतीन् । मत्वा कलियुगं प्राप्तं जगाम दिशमुत्तराम् ॥ २ ॥

saṁvīkṣya kṣullakān martyān paśūn vīrud-vanaspatīn matvā kali-yugaṁ prāptaṁ jagāma diśam uttarām

saṁvīkṣya
noticing
kṣullakān
tiny
martyān
the human beings
paśūn
animals
vīrut
plants
vanaspatīn
and trees
matvā
considering
kali-yugam
the Age of Kali
prāptam
having arrived
jagāma
he went
diśam
to the direction
uttarām
northern

Seeing that the size of all the human beings, animals, trees and plants was severely reduced, and thus realizing that the Age of Kali was at hand, Mucukunda left for the north.